After a major loss of dynamism in the 1960s, productivity growth rates began dropping in most countries, falling by half in the U.S. in the 1970s and more or less ceasing altogether in France, Germany and Britain in the late 1990s.

Germany, Italy and France appear to possess less dynamism than do the U.S. and the others.

The world's major metropolitan cities are more or less the same.

Mass prosperity came with the mass innovation that sprung up in 1815 in Britain, soon after in America, and later in Germany and France: It brought sustained growth to these nations - also to nations with entrepreneurs willing and able to copy the innovations.

The main cause of Europe's deep fall - the losses of inclusion, job satisfaction and wage growth - is the devastating slowdown of productivity that began in the late 1990s and struck large swaths of the continent. It holds down the growth of wages rates, and it depresses employment.

My views naturally have mellowed. Most of the critics have been more or less nice to me.